The Comparison of Liquid Bio-slurry and Rice Husk Biochar Application on the Production Yield of Dai Neang Chili Pepper (Capsicum annum L)

抄録

In Cambodia, Dai Neang chili pepper (Capsicum annum L) has mostly grown in areas around Tonle Sap Lake and some other provinces such as Prey Veng, Kandal, Kampong Cham, and Kampong Thom. However, farmers keep practicing conventional methods, which do not get high yield. Liquid bio-slurry and rice husk biochar which obtained from biodigester and rice production residues, could be applied to improve soil fertility for the chili production. The key objectives of this study were (1) to analyze the fertility compositions [nitrogen (N), phosphorous (P), and potassium (K)] contents in the liquid bio-slurry and rice husk biochar and (2) to investigate the effects of liquid bio-slurry and rice husk biochar on yield of Dai Neang chili pepper. In the research, different proportions of combination of liquid bio-slurry and rice husk biochar were applied on Dai Neang chili pepper in a total quantity of 1.4kg/m². Data of total yield, plant height, plants diameter, roots length, number of branches, leaves area, fruit length, and fruit weight per plant, good fruits and damaged fruits were collected as the primary data. As the results, the percentages of N-P-K compositions in the liquid bio-slurry and in the biochar were 0.52%, 1.22%, 0.30% and 0.78%, 0.73%, 3.00%, respectively. The treatment using liquid bio-slurry 25% and rice husk Biochar 75% obtained highest yield and more number of branches compared with other treatments and the control. In conclusion, liquid bio-slurry, a waste of biogas and rice husk biochar could improve the soil fertility and yield of Dai Neang chili pepper.